/**
 * Create by wlan on 2018/6/20
 * @descript: 清除默认样式
 */
body, h1, h2, h3, div, h4, h5, h6, hr, p, blockquote, dl, dt, dd, ul, ol, li, pre, form, fieldset, legend, button, input, textarea, th, td { 
  margin:0; 
  padding:0;
  -moz-box-sizing: border-box; /*Firefox3.5+*/
  -webkit-box-sizing: border-box; /*Safari3.2+*/
  -o-box-sizing: border-box; /*Opera9.6*/
  -ms-box-sizing: border-box; /*IE8*/
  box-sizing: border-box;
   }
body, button, input, select, textarea { font:12px/1.5tahoma, arial, \5b8b\4f53; }
h1, h2, h3, h4, h5, h6{ font-size:100%; }
small{ font-size:12px; }
ul, ol { list-style:none; }
a { text-decoration:none; }
a:hover { text-decoration:underline; }
sup { vertical-align:text-top; }
sub{ vertical-align:text-bottom; }
legend { color:#000; }
fieldset, img { border:0; }
button, input, select, textarea { font-size:100%; }
table { border-collapse:collapse; border-spacing:0; }
a,div,input,button,select,textarea{outline:none;}

.clear-default
  list-style none
  padding 0
  margin 0

.clear-a
  text-decoration none

.clear-fix
  &:after
    content ''
    display block
    clear both